Tim Kadlec has written these blogs about "Performance Budget". To me, it seems to go beyond Non-Functional Requirements (NFRs) associated with a typical IT Project.
- Setting a performance budget - TimKadlec.com
- Performance Budget Metrics - TimKadlec.com
- “How to Make a Performance Budget” an article by Dan Mall
However, I am trying to gauge the response from community to see if this is a tool that is commonly used or if it is still in its infancy. Please share your thoughts!